Abstract

An electromagnetic source of terahertz radiation on the basis of a tunnel long Josephson junction was proposed and experimentally studied. Output radiation was transmitted to open space by means of a slot antenna, which was located on the same microcircuit with the junction and matched with the collecting lens. Several Oscillator structures designed for operation within the frequency ranges of 250–410, 330–530, and 390–700 GHz with the possibility of continuous frequency tuning were manufactured and tested. The amplitude-frequency characteristics of output radiation with a spectral resolution of nearly 0.1 MHz were studied with the use of a terahertz-spectrometer based on a superconducting receiver. The study of transmitting antenna characteristics throughout the entire bandwidth was performed with the use of a cooled highly sensitive silicon based bolometer. The experimental results correspond to numerical calculations.

中文翻译：

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基于长约瑟夫森结的太赫兹辐射到开放空间的源

摘要

提出了基于隧道长约瑟夫森结的太赫兹辐射电磁源，并进行了实验研究。输出辐射通过缝隙天线传输到开放空间，缝隙天线与结位于同一微电路上，并与收集透镜匹配。制造并测试了几种设计用于在250–410、330–530和390–700 GHz频率范围内工作并具有连续频率调谐功能的振荡器结构。使用基于超导接收器的太赫兹光谱仪研究了光谱分辨率接近0.1 MHz的输出辐射的幅频特性。使用冷却的高灵敏度硅基辐射热计对整个带宽内的发射天线特性进行了研究。实验结果与数值计算相对应。